Improvement in apparatus for boring and rifling cannon



P. FOY.

Bbriilg and Rifling Gannon;

Patented Mar. 1-11, 1862'.

N) PETERS, PHOTO-UTHDGRAPHER. WASHINGTON, By C.

' UNITED STATES PATENT OFFICE.

PATRICK FOY, OF NEIV YORK, N. Y., ASSIGNOR TO HIMSELF AND JOHN FITCH, OF SAME PLACE.

IMPROVEMENT lN APPARATUS FOR BORINGAND RIFLING CANNON.

Specification forming part of Letters Patent No. 34,661, dated March 11, 1862.

To all whom it may concern:

Be it known that I, PATRICK FOY, of the city and State of New York, have invented and made a certainnew and useful Means for Boring and Riding Cannon, &c.; and I do hereby declare that the following is a full, clear, and exact description of the said invent-ion, reference being had to the annexed drawings, making part of this specification, wherein- Figurevl is a plan of 'my apparatus as in place for use. Fig. 2 is an end view of the same. Fig. 3 is a cross-section at the line at as. Fig. 4 is an end View of the guiding apparatus at the end of the tool bar or stock, and Fig. 5 is a plan of the end of said stock and cutter.

Similar marks of reference denote the same parts.

In rifling cannon it is usual to mount the same in a lathe and communicate a turning movement to the cannon as the cutter-bar A moves back and forth. The operation of handling and centering the cannon is both costly and difficult, involving the necessity of conveying the cannon to the lathe and the loss of time consequent thereon.

The nature of my invention consists in a mechanism that is to be connected to the cannon itself and can be employed for rifling a cannon or for boring out or truing the interior of the piece.

My apparatus is of such a character that it can readily be conveyed to the cannon and employedthereon while in a fortification or on a vessel or in any convenient locality.

The construction and operation of the said mechanism and the mode of using the same main parallel to the axis of the cannon. I.

have shown legs 01 d; but any suitable blocking may be employed.

e is a yoke or jaw receiving the muzzle of On the bed- 0 is ahead-block f, permanently fitted at one end, and g is a movable headblock adjustable on the upper surface thereof and confined by a clamp and screw beneath. (See Fig. 3.)

h is a cylindrical tool-stock sustained in the head-block g and receiving the screwnl, that passes through the head-blockfi and is provided with the gear-wheels 7c and 1.

m is a wheel provided with a crank '11,, or the same may be driven by a connection to a steam or other engine, so as to apply the necessary power to rotate the screw 2'. and give an endwisemovement to the tool-stock h, so. as to project the same into the cannon a with the required force, and in order to revolve the screw in the opposite direction and draw the tool-stock out I slip the Wheel we back into contact with an intermediate pinion 0, that acts on the pinion k and revolves the screw backward with a quicker velocity. This pin-. ion 0 is on an arm 0, held to its place by a pin insertedat 2, and p is a clutch taking a groove in the hub of m and confined by a screw, whereby the said Wheel m is held in contact with Z or 0 The tool-stock h is formed with an inclined or partially-diagonal groove 3 in the outer surface thereof at the angle or spiral COI'IG',

spending with that desired for the riflegrooves, and on the head-block g is a ring 4, held to the surface thereof by the guides 5 5, and carrying a roller or pin 6, fitting the spiral groove 3. This ring 4is provided with notches at proper distances apart around its edge, and q is a stop set on g and taking one of said notches. It will now be seen that as the said tool-stock h (fitted with a tool and guides, as hereinafter set forth) is pressed into the cannon the tool or tools thereon plane out a spiral groove or grooves in the interior thereof, the pin 6 remaining in one position as the toolstock h, with its spiral groove 3, is passed back and forth. by means of the screw '5, and when one groove or as many grooves as there are,

At the end of the tool-stock h, I provide ad-' j ustable segmental guiding-blocks s 8, form ed with curved surfaces adapted to take the inside of the cannon, and each of these se mental blocks is jointed to a diagonal. link 7, that at its other end is attached to the end of the tool-stock h, and t is a disk provided with y apparent, for the machine.canbetransported diagonal slots, that is attached to the end of 72.,and the slots therein take pins from the link 7, so that by turning this disk the said diagonal links are moved to a moreor less radial position and the segmental blocks 83 adapted to take a. cannon of greater or less caliber.

The said disk t. is retained firmly when ad- I j usted by the clamping-screw'8, and thereby the segmental guiding-blocks are held firmly, andinuse they slide on the interior of the gun. and keep the cutter or cutters firmly to their works When this. mechanism is tobe employed for boring-out, a cannon or for smoothing the interior, a suitable tool or tools are to be attached. to the stock h, and in some instances the 1 same may have to extend beyond the guide-' blocks: s 8: or be attached to the extreme end of the said stock 71., and the stop qis to be turned aside, that the ring 4 may revolve with the cutter-stock h.

u is an auxiliary shaft with a groove taking a key in the pin-ion '0, set and moving with ranged andacting as and for the purposes set forth.

the. sliding head '0' at the end of thetool-stoek h, and on thistool-stock is a wheel w. These parts when the machine is used for riding gearing o m, in combination with the toot or cutter stock It and screw 7;, with their reslide back and forth without being operative; but forboring I slip the pinion m off its stud and place it upon the end of the shaft to, to which it is to be attached by the cross pin or key. (See dotted lines, Figs. 1 and 2.) It

will now be seen thatthe parts are all free to turn, and that the crank n or its equivalent will rotate the tool-stock and cause its cutter to bore out the cannon. If the screw t stood i still, the feeding would be too fast, and if ro- I tated at the same speed as the tool-stockthere would be nofeeding movement or progression of the cutter and stock into the cannon. I therefore provide that the pinion m be slightly smaller than the pinion 0, while the wheel l is slightly larger than the wheel w, whereby the screw 11 will be rotated a very little less than the tool-stock h, to gradually feed thesame along. To run the screw back, the key .may be taken out, so that the pinion m may i be used to revolve the screw t'alone in the opposite direction, or the intermediate pinion 0 may be moved to the other side, as seen by 'dotted lines in Fig. 2, and the pinion m slid back on the end of the shaft 11. into contact therewith, when all the parts will still: be re -Volved, but the screw will be run; back with; a faster motion thanthe aforesaid forward movement, because thewheel kis' snialler'thanthe wheel Z.

The advantages of my apparatus will be and applied to any cannon to which it may beadapted in size, and said apparatus can be used with several different calibers, inconsequence of the movable segmental guide-blocks f s a being adjustable.

This apparatus, when attached toacanno'n, can; be used for smoothing and truing out the inside, and then for rifling, wiithoutzdis iconnectingfrom the gun, and on the parts being drawn out of the gun the expanding segmental guides s s aid in the removal of j chips or borings. v What I claim, and desire to secure by Letters Patent, is- I p 7 1. The headblock 9, provided with the adjustable ring 4, pin 6', and stop q, together with the frame 0 and driving-gearingin combination with the screw 1, and spirally-grooved cutter-stock h, the wholearranged' and acting inthe manner and for the purposes substanftially as specified.

2. The guiding-segments as, and plate t, ar-

The auxiliary shaft u,. provided withthe spective: gearsw l, substantially as and for'the purposes specified.

In witness whereof I have hereunto set i 

